JP5314839B2 - 研磨用組成物及び研磨方法 - Google Patents
研磨用組成物及び研磨方法 Download PDFInfo
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- 238000005498 polishing Methods 0.000 title claims abstract description 236
- 239000000203 mixture Substances 0.000 title claims abstract description 142
- 238000000034 method Methods 0.000 title claims abstract description 19
- 229910052802 copper Inorganic materials 0.000 claims abstract description 21
- 239000010949 copper Substances 0.000 claims abstract description 21
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000004020 conductor Substances 0.000 claims description 99
- -1 polyoxyethylene group Polymers 0.000 claims description 38
- 239000002736 nonionic surfactant Substances 0.000 claims description 37
- 239000003945 anionic surfactant Substances 0.000 claims description 34
- 125000006353 oxyethylene group Chemical group 0.000 claims description 14
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 10
- 239000012212 insulator Substances 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 8
- 125000000217 alkyl group Chemical group 0.000 claims description 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 6
- 125000000129 anionic group Chemical group 0.000 claims description 6
- 125000000524 functional group Chemical group 0.000 claims description 5
- 125000005037 alkyl phenyl group Chemical group 0.000 claims description 4
- 239000008119 colloidal silica Substances 0.000 claims description 4
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims description 3
- 125000003342 alkenyl group Chemical group 0.000 claims description 3
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 3
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- ISIJQEHRDSCQIU-UHFFFAOYSA-N tert-butyl 2,7-diazaspiro[4.5]decane-7-carboxylate Chemical compound C1N(C(=O)OC(C)(C)C)CCCC11CNCC1 ISIJQEHRDSCQIU-UHFFFAOYSA-N 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical group CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims 1
- 238000007517 polishing process Methods 0.000 claims 1
- 239000004065 semiconductor Substances 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 10
- 229920000259 polyoxyethylene lauryl ether Polymers 0.000 abstract description 4
- 239000004094 surface-active agent Substances 0.000 abstract description 3
- 241000047703 Nonion Species 0.000 abstract 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 abstract 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 abstract 1
- 235000011130 ammonium sulphate Nutrition 0.000 abstract 1
- 150000001450 anions Chemical class 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 description 36
- 239000003795 chemical substances by application Substances 0.000 description 26
- 239000006061 abrasive grain Substances 0.000 description 21
- 230000004888 barrier function Effects 0.000 description 18
- 230000007423 decrease Effects 0.000 description 13
- 230000009471 action Effects 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 12
- 239000007800 oxidant agent Substances 0.000 description 12
- 238000005530 etching Methods 0.000 description 11
- DHMQDGOQFOQNFH-UHFFFAOYSA-N Glycine Chemical compound NCC(O)=O DHMQDGOQFOQNFH-UHFFFAOYSA-N 0.000 description 8
- 239000012964 benzotriazole Substances 0.000 description 7
- 238000000227 grinding Methods 0.000 description 7
- 230000001629 suppression Effects 0.000 description 7
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 6
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 6
- 125000003354 benzotriazolyl group Chemical class N1N=NC2=C1C=CC=C2* 0.000 description 6
- 230000005661 hydrophobic surface Effects 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 239000011164 primary particle Substances 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 4
- 239000004471 Glycine Substances 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 4
- 239000003002 pH adjusting agent Substances 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 150000005215 alkyl ethers Chemical class 0.000 description 3
- 230000002209 hydrophobic effect Effects 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- 229920000570 polyether Polymers 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000004438 BET method Methods 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RZXLPPRPEOUENN-UHFFFAOYSA-N Chlorfenson Chemical compound C1=CC(Cl)=CC=C1OS(=O)(=O)C1=CC=C(Cl)C=C1 RZXLPPRPEOUENN-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical group C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- QNAYBMKLOCPYGJ-REOHCLBHSA-N L-alanine Chemical compound C[C@H](N)C(O)=O QNAYBMKLOCPYGJ-REOHCLBHSA-N 0.000 description 1
- KZSNJWFQEVHDMF-BYPYZUCNSA-N L-valine Chemical compound CC(C)[C@H](N)C(O)=O KZSNJWFQEVHDMF-BYPYZUCNSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical group [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 description 1
- KZSNJWFQEVHDMF-UHFFFAOYSA-N Valine Natural products CC(C)C(N)C(O)=O KZSNJWFQEVHDMF-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 235000004279 alanine Nutrition 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001370 alpha-amino acid derivatives Chemical class 0.000 description 1
- 235000008206 alpha-amino acids Nutrition 0.000 description 1
- BTBJBAZGXNKLQC-UHFFFAOYSA-N ammonium lauryl sulfate Chemical compound [NH4+].CCCCCCCCCCCCOS([O-])(=O)=O BTBJBAZGXNKLQC-UHFFFAOYSA-N 0.000 description 1
- 229940063953 ammonium lauryl sulfate Drugs 0.000 description 1
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium peroxydisulfate Substances [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 1
- VAZSKTXWXKYQJF-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)OOS([O-])=O VAZSKTXWXKYQJF-UHFFFAOYSA-N 0.000 description 1
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- WWLOCCUNZXBJFR-UHFFFAOYSA-N azanium;benzenesulfonate Chemical compound [NH4+].[O-]S(=O)(=O)C1=CC=CC=C1 WWLOCCUNZXBJFR-UHFFFAOYSA-N 0.000 description 1
- AERRGWRSYANDQB-UHFFFAOYSA-N azanium;dodecane-1-sulfonate Chemical compound [NH4+].CCCCCCCCCCCCS([O-])(=O)=O AERRGWRSYANDQB-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 150000001879 copper Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- SCVFZCLFOSHCOH-UHFFFAOYSA-M potassium acetate Substances [K+].CC([O-])=O SCVFZCLFOSHCOH-UHFFFAOYSA-M 0.000 description 1
- 235000011056 potassium acetate Nutrition 0.000 description 1
- 229940096992 potassium oleate Drugs 0.000 description 1
- MLICVSDCCDDWMD-KVVVOXFISA-M potassium;(z)-octadec-9-enoate Chemical compound [K+].CCCCCCCC\C=C/CCCCCCCC([O-])=O MLICVSDCCDDWMD-KVVVOXFISA-M 0.000 description 1
- 239000003755 preservative agent Substances 0.000 description 1
- 230000002335 preservative effect Effects 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 239000004474 valine Substances 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
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- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
Description
(1)トレンチの中に位置する導体層の部分(導体層の内側部分)が除去されることにより導体層の上面のレベルが低下するディッシングと呼ばれる現象の発生を抑制すること。
しかしながら、特許文献1,2の研磨用組成物は、これらの要求性能を確実かつ十分に満足するものではなく、依然として改良の余地を残している。
はじめに、半導体配線プロセスを図1(a)〜図1(d)に従って説明する。半導体配線プロセスは通常、以下の工程を含む。
本実施形態の研磨用組成物には、研磨用組成物を用いて研磨した後の研磨対象物表面の水接触角が60度以下、好ましくは45度以下、より好ましくは30度以下となるように、アニオン界面活性剤とノニオン界面活性剤が含有されている。この研磨用組成物によれば、研磨対象物の表面と砥粒との間の親和性について、ディッシングに関する要求性能と研磨速度に関する要求性能の両方を満たすことができるような性能を示す。従って、本実施形態の研磨用組成物は、半導体配線プロセスにおいて導体層14を研磨する用途で好適に使用することができる。
・ 前記実施形態の研磨用組成物は使用前に濃縮原液を希釈することによって調製されてもよい。
次に、本発明の実施例及び比較例を説明する。
表1及び表2の“酸化剤”欄中、D1は過酸化水素を表す。
表1及び表2の“エッチング剤”欄中、E1はグリシンを表す。
表1及び表2の“pH調整剤”欄中、G1は水酸化カリウムを表す。
Claims (3)
- コロイダルシリカ、アニオン界面活性剤、ノニオン界面活性剤、及び過酸化水素を含有し、銅を研磨する用途で使用される研磨用組成物であって、
前記アニオン界面活性剤は、化学式:R1−Y1又はR1−X1−Y1(但し、R1はアルキル基、アルキルフェニル基又はアルケニル基を表し、X1はポリオキシエチレン基、ポリオキシプロピレン基又はポリ(オキシエチレン・オキシプロピレン)基を表し、Y1はアニオン性官能基を表す。)で表される少なくとも一種類の化合物を含み、
前記ノニオン界面活性剤は、化学式:R2−X2(但し、R2はアルキル基を表し、X2はポリオキシエチレン基、ポリオキシプロピレン基又はポリ(オキシエチレン・オキシプロピレン)基を表す。)で表され、かつHLB値が10〜16である少なくとも一種類の化合物を含み、
前記アニオン界面活性剤の含有量は、0.01g/L以上且つ10g/L以下であり、前記ノニオン界面活性剤の含有量は、0.01g/L以上且つ20g/L以下であって、
ポリウレタン積層パッドを用いて、圧力13.8kPa、定盤及びキャリアともに回転数100rpm、並びに研磨用組成物の供給速度を200mL/分の条件で、前記研磨用組成物を用いて、銅を研磨した後の研磨対象物表面の水接触角が60度以下となるように調製されたことを特徴とする研磨用組成物。 - 前記アニオン界面活性剤におけるY1は、カルボン酸、リン酸、亜リン酸、硫酸、亜硫酸又はそれらの塩の残基である請求項1に記載の研磨用組成物。
- トレンチを有する絶縁体層の上に銅からなる導体層が設けられてなり、導体層がトレンチの外に位置する外側部分及びトレンチの中に位置する内側部分を有する研磨対象物を研磨する方法であって、
予備研磨用組成物を用いた研磨により導体層の外側部分の大半を除去する工程と、
前記予備研磨用組成物とは異なる仕上げ研磨用組成物として請求項1又は請求項2に記載の研磨用組成物を用いた研磨により導体層の外側部分の残部を除去する工程と
を備えることを特徴とする方法。
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JP2006211454A JP5314839B2 (ja) | 2006-08-02 | 2006-08-02 | 研磨用組成物及び研磨方法 |
SG200705542-9A SG139699A1 (en) | 2006-08-02 | 2007-07-30 | Polishing composition and polishing process |
TW096128012A TWI417371B (zh) | 2006-08-02 | 2007-07-31 | Abrasive composition and a grinding method |
AT07253000T ATE496103T1 (de) | 2006-08-02 | 2007-07-31 | Polierzusammensetzung und polierverfahren |
EP07253000A EP1894978B1 (en) | 2006-08-02 | 2007-07-31 | Polishing composition and polishing process |
DE602007012026T DE602007012026D1 (de) | 2006-08-02 | 2007-07-31 | Polierzusammensetzung und Polierverfahren |
KR1020070077363A KR101477796B1 (ko) | 2006-08-02 | 2007-08-01 | 연마용 조성물 및 연마 방법 |
US11/832,403 US8080476B2 (en) | 2006-08-02 | 2007-08-01 | Polishing composition and polishing process |
CN 200710143759 CN101117548B (zh) | 2006-08-02 | 2007-08-02 | 抛光用组合物以及抛光方法 |
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US9486892B2 (en) | 2012-11-02 | 2016-11-08 | Fujimi Incorporated | Polishing composition |
KR20150142695A (ko) * | 2013-04-16 | 2015-12-22 | 멕크 가부시키가이샤 | 에칭액, 보급액, 및 배선 형성 방법 |
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